Thread: 6-71 blower trouble

Quote: Originally Posted by XNTRCI-T Those Edels really don't like more than about 5.5 pounds, and that's if you have the floats set properly (you DID reset the floats per the manual, right?). If you have an adjustable regulator, wind it down to about 5 pounds. I'm running one -6 line from the pump to the regulator, then split to two -6s, one to each carb. Fuel starvation has not been a problem. What kind of throttle linkage do...

Quote: Originally Posted by msggator I can kill it by covering only one carb (no vacuum leaks). Fuel pressure is 6psi. I may be starving it some with 1 -6an feeding both carbs... If I just touch the throttle the motor goes to 4500, and I mean just breath on it. Covering the carb(s) is not going to tell you whether you have a vacuum leak, because you're shutting off the air flow through the carb(s) and that stops the fuel flow. Those...

this is how you lock out the advance on that distributor.

idle screws 1/2 turn out and it runs better is making me think your running rich on the idle circuit. maybe blown power valve or leaking by on the bowl seats. something is definately amiss there.

Quote: Originally Posted by msggator If I were to change to alcohol metering plates, would it help????? NO, and seeing how you have ruined your current blocks by completely drilling out the restriction(it should have been drilled bigger a couple thousandths at a time to find the sweet spot) it looks like replacing them with new Holley blocks or better yet some billet adjustable blocks is in your future. Do you have any kind of book or manual...

I have almost the same setup on my SBC and it works the same. Cold start at 32 deg and it just sat there purring away. We took off and drove up to the gas station and filled up and came back. We let it run for over 1/2 hour while we went over the timing and carb adjustments. It never over heated or got the headers red hot. It runs at 1000 rpm in Park and 700 rpm in gear. We let it idle for 10 minuted to simulate getting caught in traffic and...

Here's an older thread on boost-referenced blower carbs. It's got some info from Tech@BG (Barry Grant Carbs) and some more from Camaroman7d (Royce) who seems to be very well informed, IMO, when it comes to blowers.

I'm currently running twin holley 750dp blower carbs with 8.5 p.v.'s on my 6-71 sbc, and have no complaints. In fact... they work great! no start-up issues or any other probs to speak of. I don't have to wait for it to warm up to hit the gas, even when I fire it up in the high 30s (been cold here the last couple days!) No backfire or popping at all. I do have the 'blower surge' some people speak badly about though,...

What XNTRCI-T said. I have a 291 DeSoto Hemi, fresh rebuild, roller cam. I used 2 Carter Competition Series 500CFM carbs, rebuilt to 1404 specs for a blower engine, per the Edelbrock Manual. Stock distributor with a Pertronix unit in it, and an approximate initial timing setting. It didn't get to turn one complete revolution and it fired right up and ran beautifully. A little fiddling withe idle mix/ speed and it idles great. I think...